You're offering to help people with math hw? That's amazing! It's my worst subject. Two trains start fron the same station at 10 AM, one travelling east at 60 mph and the other at 70 mph. At what tome will they be 455 miles apart?
ok i might be answering this a bit late, sorry but i did solve it, basically
one of the trains will travel 60 miles in an hour and the other will travel 70 miles in an hour
so, after one hour they will be 60(1)+70(1) miles apart which is 130, so that's not it
after 3 hours that would be 390 miles so thats not it
after 4 hours its 520 (almost blaze it) miles so thats not it
after 3.5 hours it would be 455 miles (yay party we got it)
since the trains started at 10am and they are 455 miles apart after 3.5 hours they are 455 miles apart at 1:30pm